Her Wikipedia article is as follows:
Sophia Hayden Bennett (October 17, 1868 – February 3, 1953) was the first American woman to receive an architecture degree.
Bennett was born in Santiago, Chile. She graduated from the Massachusetts Institute of Technology in 1890 with a degree in architecture. She is best known for designing the Woman's Building at the World's Columbian Exposition, designing the building when she was just 21. She received $1,000 at the time for the design, when male architects earned ten times as much. Bennett died in 1953 in Winthrop, Massachusetts.
For more information about Sophia Hayden Bennett, see this link, or you can read about her in The First American Women Architects by Sarah Allaback.